Synthetic Nitrogen Fertilizers Deplete Soil Nitrogen: A Global Dilemma for Sustainable Cereal Production -- Mulvaney et al. 38 (6): 2295 -- Journal of Environmental Quality

Overuse of Nitrogen is Depleting our Soils!
TECHNICAL REPORTS
Plant and Environment Interactions
Synthetic Nitrogen Fertilizers Deplete Soil Nitrogen: A Global Dilemma for Sustainable Cereal Production
R. L. Mulvaney*, S. A. Khan and T. R. Ellsworth
Dep. of Natural Resources and Environmental Sciences, Turner Hall, 1102 S. Goodwin Ave., Univ. of Illinois, Urbana, IL 61801. This study was performed with partial funding under Projects ILLU-875-375 and ILLU-875-397, Illinois Agric. Exp. Stn., and with additional support generated through the 15N Analysis Service